Electromagnetic fields control for widening workspace of microrobots

Recently several types of microrobots and control system have been proposed using electromagnetic fields. Magnetized microrobot can be controlled using Helmholtz coils and Maxwell coils. In the previously proposed system, workspace for microrobots is small to make uniform magnetic fields and uniform gradient of magnetic fields. In this paper, new coil system and control method for electromagnetic fields is proposed to expand workspace of microrobots. By widening workspace magnetic microrobots can have diverse applications and enough space for experimental equipment such as a microscope, microfluidic channels and so on.